I've got an upcoming project in which the customer wants a perfect, mirror finish with no wood grain texture. In the past, I've just put on many, many coats of finish, and sanded them down, but that uses a ton of material, and I'm trying to get into new ways of doing things. I know lost of folks use grain filler, and I'm trying to figure out what is popular and likely to give me a good result if I apply it properly.

Thanks!